export function  debounce(func,delay){
    let timer = null;

    return function(...args){
       if(timer) clearTimeout(timer)
       timer = setTimeout(() => {
        func.apply(this,args)
       }, delay);
    }
}

// 时间戳转化
export function formatDate(date, fmt) {
    if(/(y+)/.test(fmt)) {
      fmt = fmt.replace(RegExp.$1, (date.getFullYear() + '').substr(4 - RegExp.$1.length));
    }
    let o = {
      'M+': date.getMonth() + 1,
      'd+': date.getDate(),
      'h+': date.getHours(),
      'm+': date.getMinutes(),
      's+': date.getSeconds()
    };
    for (let k in o) {
      if (new RegExp(`(${k})`).test(fmt)) {
        let str = o[k] + '';
        fmt = fmt.replace(RegExp.$1, (RegExp.$1.length === 1) ? str : padLeftZero(str));
      }
    }
    return fmt;
  }


  function padLeftZero (str) {
    return ('00' + str).substr(str.length);
  }